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King oyster mushroom
Pleurotus eryngii
Also known as : French horn mushroom, Trumpet royale, Aliʻi oyster
The king oyster mushroom (Pleurotus eryngii) is an edible mushroom widely prized for its flavor, which can be compared to scallops. It can be found wild in the warmer temperate zones of the world, and is also cultivated, growing on straw, for commercial use. The particular way in which this species decomposes plant matter may also have industrial applications.
Care Guide for King oyster mushroom
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King oyster mushroom
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Questions About King oyster mushroom
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Pruning How can I prune my King oyster mushroom?
Pruning your King oyster mushroom is a fairly simple process. First, you will need a reliable set of hand pruners or hedge trimmers. You may use a clean pair of sharp scissors if you don’t have pruners or garden shears on hand. It’s important to always clean your gardening tools before and after using them to prevent the possibility of spreading disease or infection to other plants. To prune your King oyster mushroom simply allow your plant to go dormant over the Winter. Some time between late winter and early spring – or when new growth starts to appear – take your clean pruners or trimmers and cut away any dying, damaged, yellow or declining foliage. Repeat this process until you reach the base of the plant or until there are no dead pieces left to cut. When pruning, be careful not to damage the new growth that may be emerging near the base of your plant. These parts cannot be restored and pruning can increase the ventilation of the plants and facilitate their growth. Any pruning that is done to this plant should be cut straight across the blades or stems. No angled cuts are required. Diseased leaf blade foliage can be removed as it appears. This could be done anytime when your King oyster mushroom is growing.
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What should I do after pruning my King oyster mushroom?
Once you’ve pruned your plant, you should dispose of the stems and leaves either by composting the healthy ones or throwing out the diseased parts. You can also fertilize just before or after pruning, which gives King oyster mushroom a little vitamin boost that can provide it the nutrients needed to better protect itself from any nearby pathogens or diseases. Do not water the King oyster mushroom immediately after pruning as this can lead to fungal infestation of the plants through the wounds. You don’t need much after care when you’re done pruning. It might benefit from light watering and some liquid plant food to encourage new growth.
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How can I prune my King oyster mushroom during different seasons?
Early spring and late winter are the best times to prune your King oyster mushroom on a large scale. If you want to control the size of your King oyster mushroom, you can prune them as you wish, but be careful not to prune more than a third of the size of the plant. Yellow and diseased leaves may appear during the summer months when the King oyster mushroom is growing vigorously and these types of leaves need to be pruned back immediately. These parts of the King oyster mushroom cannot be restored and pruning increases the ventilation of the plant and facilitates its growth.
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When should I prune my King oyster mushroom through different stages of growth?
Strategic pruning is usually done at different times of the year or during certain stages of growth depending on the plant. However, knowing when to prune your King oyster mushroom depends on where you live and how established your plant is. For example, if your King oyster mushroom is a new resident, it’s a good idea to wait until the plant starts to grow back before you start pruning. On the other hand, if your plant is already established, you will want to prune the dry or dead parts in plant before new leafy growth appears in early spring or late winter. This is the time of year when plants are dormant and pruning causes the least damage to them. This is also the best time of year to do more extensive pruning. It’s important to note that if King oyster mushroom is pruned too late in the season, it can leave new growth at risk for damage or disease. However, if your King oyster mushroom is indoors this is not a problem and you can prune at any time. Since this can affect the long-term health and appearance of your plant, it’s important to keep this in mind when deciding when and how to prune. As your King oyster mushroom grows larger over time, you can trim it as needed after annual pruning. Dead, damaged, or diseased leaf blade foliage can be removed as it appears. This could be done anytime when your King oyster mushroom is growing.
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Key Facts About King oyster mushroom
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Attributes of King oyster mushroom
Lifespan
Perennial
Plant Height
4 inches
Spread
6 inches
Leaf type
Deciduous
Scientific Classification of King oyster mushroom
Phylum
Club fungi
Class
Mushroom-forming fungi
Order
Gilled fungi
Family
The tree mushroom family
Genus
Oysters
Species
King oyster mushroom
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Common Pests & Diseases About King oyster mushroom
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Common issues for King oyster mushroom based on 10 million real cases
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Solutions: Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Fruit mold
Fungal infections can cause mold to grow on the surface of the fruit and may also cause decay.
Solutions: There are some relatively easy steps to stop the spread of fruit mold, but swift action must be taken. Prune away infected fruits or flowers. As soon as lesions or fuzz are seen, cut away the infected parts and dispose of them. Do not compost. Apply fungicide to plants with mild infections (those with severe infections may need to be destroyed). Increase airflow. Since spores are mainly wind born, increasing the airflow around your plants will make them less susceptible to infection. Maintain maximum space between plants and open branch structures during the pruning season.
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
- Both leaves and blossom on the tips of branches will go brown and wither.
- Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
- Any fruit that does appear will turn wrinkled and fail to develop.
- Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
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Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Overview
Petal blight, sometimes called flower blight, is a fungal disease that only affects the blooms of some ornamental flowering plants. As the infection progresses, it destroys the flower, yet it never damages the vegetative or green parts of the plant.
When flowers are infected, the symptoms look similar to Botrytis blight, but Botrytis also infects dead or dormant vegetative tissue.
The disease was first discovered in Japanese plants in 1919 and in the US in the late 1930s. Presently it is also found in New Zealand, Australia, and parts of Europe. Unfortunately, no plants have high resistance to petal blight, but specific cultivars are more susceptible than others, particularly species with double blooms.
Petal blight infection rates are high when temperatures are mild to warm (optimum temperatures are 15 to 21 ℃) and the weather is misty or rainy.
Overall, petal blight is an aesthetic problem that ruins blossoms. The disease is not harmful to the long-term health of the plant.
Symptom Analysis
The severity of the symptoms varies, depending upon the species of plant infected. Signs of petal blight are commonly seen on the blooms just after they open.
- Pallid spots on colored petals.
- Brown spots on white petals.
- Browning around the petal edges.
- Small spots look water-soaked.
- Spots rapidly enlarge and merge.
- Flowers become limp.
- The entire flower turns light brown, but does not crumble.
- Flowers become slimy at first and then take on a leathery texture.
- A ring of white or gray mycelium can be seen at the base of the petals.
Disease Cause
Petal blight is caused by several different fungi, with each type infecting specific plants. Ovulinia azalea infects azaleas species and cultivars, and rhododendrons. Ciborinia camelliae infects camellia cultivars.
Shortly after blooming, the fungus infects the base of the flowers by the calyx. The fungus produces cell wall-degrading enzymes that destroy flowers within a couple of days. When the flowers fall to the ground, the fungus' hard fruiting bodies fall to the soil as well, overwintering until the following spring.
When temperatures hit the optimum range the following season, spores are transmitted by insects or can spread on wind currents up to about 12 miles. Once in the soil, the pathogen can be active for three to five years.
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Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
- Wilted, droopy flowers
- Petals and leaves begin to wrinkle
- Brown papery streaks or spots appear on the petals and leaf tips
- Flowerhead shrink in size
- Petal color fades
- Yellowing leaves
- Complete death of the flower
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
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Fruit mold
Fungal infections can cause mold to grow on the surface of the fruit and may also cause decay.
Overview
Fruit mold is the result of fungal infection by one or more of a wide variety of fungal species. Favoring damp and cool conditions, this problem can have a devastating effect on most fruit crops as it tends to occur just when fruit are reaching maturity. Once mold establishes itself, the fruit quickly decays and becomes inedible. The fungus is capable of spreading quickly to other fruit, either or the same plant or on neighboring plants.
Symptom Analysis
Symptoms tend to be obvious but are quick to develop.
- Brown lesions form on the fruit and occasionally the blossoms. These lesions become soft, mushy, and develop a fuzzy gray or brown coating.
- The infection will very quickly spread to any fruit in contact with those that are infected.
- Fruit may drop or remain on the plant and mummify over time.
- Infection may spread to leaves and new branches, eventually leading to demise of the entire plant .
Disease Cause
This condition is caused by one of a number of fungal species which all follow a similar cycle. Spores remain dormant on dead plant material over the winter months and then emerge during the spring when they are carried by the wind or insect vectors to the host plant. Once they land on a plant, often facilitated by damp conditions, the spores will gain entry and breed (sporulate) rapidly. Entry to the plant is often through damage caused by sap-sucking insects.
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More Info on King Oyster Mushroom Growth and Care
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Basic Care Guide
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Transplant
9-12 inches
The perfect moment for transplanting king oyster mushroom falls between S1-S2, the season when they thrive best. Choose a spot with moderate temperature and natural light for an optimum growth. Remember, king oyster mushroom prefers deep, fertile soil. Every transplanting task needs careful observations for king oyster mushroom's health!
Transplant Techniques 
Feng shui direction
North
King oyster mushroom is often considered harmonious in a Feng Shui setting as it symbolizes natural growth and prosperity. Particularly when facing North, this plant is believed to tap into the residing energy of career growth - a well-rooted Feng Shui idea, despite our reluctance to claim it as a conclusive fact.
Fengshui Details Plants Related to King oyster mushroom
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Swan's-neck thyme-moss
A very common moss, the swan's-neck thyme-moss forms dense, soft tufts there were once used traditionally as a stuffing for mattresses. It grows in wet habitats, with constantly open spores that absorb water. It provides a habitat for numerous insects, frogs, and fungi.
Alpine rose
Alpine rose (Rosa pendulina) is a deciduous perennial shrub that will grow to 1.8 m tall. A nearly thornless rose bush that produces rich pink flowers with bright yellow centers. Blooms profusely in spring, producing one single flower on each stem. Thrives in full sun and prefers rich, well-drained soil.
Kamala tree
The kamala tree (Mallotus philippensis) is a tropical tree most notable for its bright orange-red seed pods that are valued for their dye-producing abilities. The tree is also grown for its wood. This tree is also grown ornamentally, largely because of its brightly colored fruit.
Fragrant aralia
Fragrant aralia (Heteropanax fragrans) is a plant species native to southern Asia. Fragrant aralia is one of many tree species within the Heteropanax genus, and all the trees in the genus are native to Asia.
Hornbeam copperleaf
Hornbeam copperleaf (Acalypha persimilis) is summer annual that grows from 30 to 61 cm tall. It has large leaves and male and female flowers growing on the same bush. Cylindrical spikes with dense masses of tiny white flowers bloom from summer to fall. Female flowers are replaced by seed capsules that open when ripe and are dispersed by wind. This species prefers full sun to partial shade.
Catchfly prairie gentian
The catchfly prairie gentian is a perennial herb native to the southern US and the West Indies. It is salt tolerant and provides purple bell-shaped flowers in the blooming season. Catchfly prairie gentian is closely related to Texas bluebell (Eustoma russellianum) which is widely used as a cut flower.
Garlic
Garlic (Allium sativum) is an extremely popular garden plant because of its use for flavoring dishes, as well as its ease of care and growth. It is traditionally planted in autumn and harvested in mid-summer. This plant is also called the stinking rose, and it is useful as an insect repellent in gardens. Garlic is important to Korean creation myths, and is believed to ward off vampires and other spirits in European folklore.
Oyster mushroom
Oyster mushrooms grow wild but are also cultivated for sale in supermarkets. They can even be cultivated at home. They will grow on coffee grounds and spent grain, and are occasionally even fashioned into an environmentally-friendly substitute for styrofoam. There are several toxic look-alike species, so it is best to buy these mushrooms at the store.
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About
Care Guide
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Pests & Diseases
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Related Plants
King oyster mushroom
Pleurotus eryngii
Also known as: French horn mushroom, Trumpet royale, Aliʻi oyster
The king oyster mushroom (Pleurotus eryngii) is an edible mushroom widely prized for its flavor, which can be compared to scallops. It can be found wild in the warmer temperate zones of the world, and is also cultivated, growing on straw, for commercial use. The particular way in which this species decomposes plant matter may also have industrial applications.
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Care Guide for King oyster mushroom
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Questions About King oyster mushroom
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Pruning How can I prune my King oyster mushroom?
What should I do after pruning my King oyster mushroom?
How can I prune my King oyster mushroom during different seasons?
When should I prune my King oyster mushroom through different stages of growth?
Get tips and tricks for your plants.
Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.
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More Questions People Also Ask
Key Facts About King oyster mushroom
Feedback
Attributes of King oyster mushroom
Lifespan
Perennial
Plant Height
4 inches
Spread
6 inches
Leaf type
Deciduous
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Scientific Classification of King oyster mushroom
Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
The tree mushroom family Genus
Oysters Species
King oyster mushroom 
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Common Pests & Diseases About King oyster mushroom
Feedback
Common issues for King oyster mushroom based on 10 million real cases
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Solutions: There are a number of appropriate solutions to control fruit withering: Remove any fruit as soon as it shows any signs of infection. Do not compost. Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Learn More About the Fruit withering ![more]()
Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Solutions: Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Learn More About the Petal blight ![more]()
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Solutions: If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible. For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface. In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well. If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Learn More About the Flower withering ![more]()
Fruit mold
Fungal infections can cause mold to grow on the surface of the fruit and may also cause decay.
Solutions: There are some relatively easy steps to stop the spread of fruit mold, but swift action must be taken. Prune away infected fruits or flowers. As soon as lesions or fuzz are seen, cut away the infected parts and dispose of them. Do not compost. Apply fungicide to plants with mild infections (those with severe infections may need to be destroyed). Increase airflow. Since spores are mainly wind born, increasing the airflow around your plants will make them less susceptible to infection. Maintain maximum space between plants and open branch structures during the pruning season.
Learn More About the Fruit mold ![more]()
Fruit withering
Fungal infection or normal ripening can cause the fruit to dry out.
Overview
Fruit withering is common on many tree fruits, including apples, pears, peaches, cherries, and plums, as well as fruiting shrubs. It is caused by a fungal pathogen and will result in wrinkled and desiccated fruit.
Symptom Analysis
Here are the most common symptoms in the order that they are likely to occur.
- Both leaves and blossom on the tips of branches will go brown and wither.
- Gray powdery patches will appear on infected leaves and flowers, and this will be most apparent after rain.
- Any fruit that does appear will turn wrinkled and fail to develop.
- Branch tips begin to die, progressing back to larger branches, causing general deterioration of the tree or plant.
Disease Cause
The withering is caused by one of two fungal pathogens, one called Monilina laxa and the other called M. fructigen. The spores overwinter on infected plant material and are then spread the following spring by wind, rain, or animal vectors. The problem will start to become noticeable in mid-spring, but will increase in severity as summer progresses and the fungus grows. If not addressed, the disease will intensify and spread to other plants in the vicinity.
Solutions
There are a number of appropriate solutions to control fruit withering:
- Remove any fruit as soon as it shows any signs of infection. Do not compost.
- Use a fungicide prior to leaf bud and then as per manufacturers instructions throughout the season.
Prevention
Preventative measures include:
- Ensuring adequate spacing between plants or trees.
- Staking plants that are prone to tumbling to prevent moisture or humidity build up.
- Prune correctly so that there is adequate air movement and remove any dead or diseased branches that may carry spores.
- Practice good plant hygiene by removing fallen material and destroying it as soon as possible.
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Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Overview
Petal blight, sometimes called flower blight, is a fungal disease that only affects the blooms of some ornamental flowering plants. As the infection progresses, it destroys the flower, yet it never damages the vegetative or green parts of the plant.
When flowers are infected, the symptoms look similar to Botrytis blight, but Botrytis also infects dead or dormant vegetative tissue.
The disease was first discovered in Japanese plants in 1919 and in the US in the late 1930s. Presently it is also found in New Zealand, Australia, and parts of Europe. Unfortunately, no plants have high resistance to petal blight, but specific cultivars are more susceptible than others, particularly species with double blooms.
Petal blight infection rates are high when temperatures are mild to warm (optimum temperatures are 15 to 21 ℃) and the weather is misty or rainy.
Overall, petal blight is an aesthetic problem that ruins blossoms. The disease is not harmful to the long-term health of the plant.
Symptom Analysis
The severity of the symptoms varies, depending upon the species of plant infected. Signs of petal blight are commonly seen on the blooms just after they open.
- Pallid spots on colored petals.
- Brown spots on white petals.
- Browning around the petal edges.
- Small spots look water-soaked.
- Spots rapidly enlarge and merge.
- Flowers become limp.
- The entire flower turns light brown, but does not crumble.
- Flowers become slimy at first and then take on a leathery texture.
- A ring of white or gray mycelium can be seen at the base of the petals.
Disease Cause
Petal blight is caused by several different fungi, with each type infecting specific plants. Ovulinia azalea infects azaleas species and cultivars, and rhododendrons. Ciborinia camelliae infects camellia cultivars.
Shortly after blooming, the fungus infects the base of the flowers by the calyx. The fungus produces cell wall-degrading enzymes that destroy flowers within a couple of days. When the flowers fall to the ground, the fungus' hard fruiting bodies fall to the soil as well, overwintering until the following spring.
When temperatures hit the optimum range the following season, spores are transmitted by insects or can spread on wind currents up to about 12 miles. Once in the soil, the pathogen can be active for three to five years.
Solutions
Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Prevention
- Apply a preventative dose of fungicide as soon as blooms start to show color on the plant. The preventative can be applied as a soil drench or directly to the flowers on the plant.
- Avoid overhead watering during blooming.
- Remove any leaf litter and dead flowers at the end of the season.
- Cover the ground under infected plants with 4” of fresh organic mulch before winter, taking care not to disturb the infected soil.
- Buy bare-root specimens when available.
- When potted plants are purchased, remove the top layer of potting soil and replace it with fresh mulch.
- Plant cultivars that bloom early in the season before the temperatures get high enough for petal blight pathogens to be spreading.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Flower withering
Flowers may dry out due to a sudden change in environment or because the plant has completed its normal flowering period.
Overview
Flower withering occurs when flowers become weak, droopy, wilted, or faded until they can’t be revived. During withering, they begin to wrinkle and shrink until the flower becomes completely dry or dead.
Any flowers, regardless of the plant type or the climate they are grown in, are susceptible to withering. It is a worldwide problem across houseplants, herbs, flowering ornamentals, trees, shrubs, garden vegetables, and food crops.
Unlike wilting—which withering is often confused with—withering can be caused by different things and is often due to more than a lack of water. Withering can be fatal in severe cases.
Symptom Analysis
Flower withering progresses from very mild cases to severe occurrences that kill the flower. The severity of the symptoms is related to the cause and how long the condition is allowed to progress before action is taken.
- Wilted, droopy flowers
- Petals and leaves begin to wrinkle
- Brown papery streaks or spots appear on the petals and leaf tips
- Flowerhead shrink in size
- Petal color fades
- Yellowing leaves
- Complete death of the flower
Disease Cause
The main causes of flower withering include natural age progress, lack of water, nutritional deficiencies, and bacterial or fungal diseases. It’s critical to determine the underlying cause when flower withering is noticed. This will guide the best course of action, if treatment is possible.
Check the soil for moisture and then closely examine the entire plant for signs of nutrient deficiencies. If neither of those appears to be the cause then cut open the stem below a flower. If a cross-section reveals brown or rust-colored stains it is safe to assume that this is a bacterial or fungal infection.
If the flower is nearing the end of its normal lifespan, genetic coding within the plant increases the production of ethylene, a phytohormone that controls senescence, or cell aging and death. Cell division stops and the plant begins breaking down resources within the flower to use in other parts of the plant.
In all other cases, flower withering happens when the plant seals off the stem as a defense mechanism, stopping transport within the vascular system. This prevents further water loss through the flowers but also stops bacteria and fungi from moving to healthy parts of the plant. Once water and nutrient transport stops, the flower begins to wither and ultimately die.
Solutions
If flower withering is a natural progression due to age, there is nothing that can be done to slow or stop the process. Once hormones within the plant begin the process of senescence, it’s irreversible.
For lack of water, immediately water the plant using room temperature rainwater, bottled spring water, or filtered tap water. Water container plants until excess water drains out the bottom; water in-ground plants until the soil is soaked but there isn’t standing water on the surface.
In the event of nutritional deficiencies, the best solution is to use a granular or water-soluble liquid fertilizer, and apply it to the soil at about half the recommended dosage. Keep it off the leaves and make sure granular products are watered into the soil well.
If the plant is infected with a bacterial or fungal pathogen, there is no course of treatment that cures the diseased plants. The best solution is to remove the infected plants and dispose of the plant material off-site. Do not put in a compost pile.
Prevention
This is definitely one of those instances where prevention is more effective than cure. Here are some preventative measures for avoiding premature flower withering.
- Water plants according to their needs -- either keep the soil slightly moist or allow the top inch or two to dry out before watering again.
- Fertilize lightly on a consistent basis, depending upon the plant’s growth. Quick-growing plants and those that flower or develop fruit will need more frequent fertilizing than slow-growing plants.
- Purchase plants that are certified disease- or pathogen-free.
- Look for disease-resistant cultivars.
- Isolate plants showing disease symptoms to prevent the spread to neighboring plants.
- Practice good plant hygiene by removing any fallen plant material as soon as possible.
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Fruit mold
Fungal infections can cause mold to grow on the surface of the fruit and may also cause decay.
Overview
Fruit mold is the result of fungal infection by one or more of a wide variety of fungal species. Favoring damp and cool conditions, this problem can have a devastating effect on most fruit crops as it tends to occur just when fruit are reaching maturity. Once mold establishes itself, the fruit quickly decays and becomes inedible. The fungus is capable of spreading quickly to other fruit, either or the same plant or on neighboring plants.
Symptom Analysis
Symptoms tend to be obvious but are quick to develop.
- Brown lesions form on the fruit and occasionally the blossoms. These lesions become soft, mushy, and develop a fuzzy gray or brown coating.
- The infection will very quickly spread to any fruit in contact with those that are infected.
- Fruit may drop or remain on the plant and mummify over time.
- Infection may spread to leaves and new branches, eventually leading to demise of the entire plant .
Disease Cause
This condition is caused by one of a number of fungal species which all follow a similar cycle. Spores remain dormant on dead plant material over the winter months and then emerge during the spring when they are carried by the wind or insect vectors to the host plant. Once they land on a plant, often facilitated by damp conditions, the spores will gain entry and breed (sporulate) rapidly. Entry to the plant is often through damage caused by sap-sucking insects.
Solutions
There are some relatively easy steps to stop the spread of fruit mold, but swift action must be taken.
- Prune away infected fruits or flowers. As soon as lesions or fuzz are seen, cut away the infected parts and dispose of them. Do not compost.
- Apply fungicide to plants with mild infections (those with severe infections may need to be destroyed).
- Increase airflow. Since spores are mainly wind born, increasing the airflow around your plants will make them less susceptible to infection. Maintain maximum space between plants and open branch structures during the pruning season.
Prevention
There are easy, preventative steps the gardener can take to stop mold from attacking fruits and fruit-bearing plants:
- Rake up rotting debris when the growing season is over. Fungi can overwinter on rotting debris and reinfect plants the following season. Clear the ground beneath fruit trees and remove hanging mummified fruit.
- Prune off any infected branches.
- Burn all infected debris.
- Preemptively apply fungicide to susceptible plants, especially in the spring. This can help prevent infections from progressing to a stage where fruits are affected.
- Don't overcrowd when planting. Overcrowding will reduce air circulation, leaving plants wetter for longer and increasing the chance of infection.
- Use drip irrigation instead of overhead irrigation. This will help keep plant surfaces free of moisture, while still ensuring roots are getting enough water. Hose-watering should be performed early in the day, with the spray directed at the base of plants.
- Don't over-fertilize early in the spring. Added nutrients will increase leaf size. As leaves can hold moisture and provide a surface for spores to adhere to, this can increase the chance that mold grows on the plant. Fertilizing later in the season, when fruits are ripening, means additional nutrients will be directed towards those fruits, rather than leaves.
- Insect prevention measures will reduce wounds on plants and decrease access points for fungal spores.
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